World's Largest Cities by Population: Top 20 Urban Centers

The following list ranks the world's most populous city proper (administrative boundaries) based on recent estimates. Note: metropolitan area rankings differ significantly (Tokyo, Delhi, Shanghai lead metro rankings).

Top 20 City Proper Populations (Approximate)

1. Shanghai, China ~29M
2. Beijing, China ~22M
3. Chongqing, China ~17M (vast administrative area = province-sized)
4. Tianjin, China ~14M
5. Guangzhou, China ~14M
6. Shenzhen, China ~13M
7. Istanbul, Turkey ~15M (transcontinental)
8. Karachi, Pakistan ~16M
9. Mumbai, India ~13M
10. Moscow, Russia ~13M
11. São Paulo, Brazil ~12M
12. Delhi, India ~11M (city proper; metro 33M)
13. Seoul, South Korea ~9.7M (metro 26M)
14. Tokyo, Japan ~9.7M (23 wards; metro 37M = world's largest)
15. Jakarta, Indonesia ~11M (city proper; metro 35M)
16. Lagos, Nigeria ~15M (estimates vary wildly)
17. Kinshasa, DRC ~15M
18. Mexico City, Mexico ~9.2M (metro 22M)
19. London, UK ~9M (City of London tiny; Greater London 9M)
20. New York City, USA ~8.5M (5 boroughs; metro 20M)

Critical Caveats

• Definitions vary wildly: "City proper" boundaries are political, not functional
• Chinese cities often encompass huge rural areas (Chongqing = Austria-sized)
• Metropolitan/urban area measures are more meaningful for economic/social analysis
• Data sources/years differ: UN, national censuses, city governments—rarely aligned
• Rapid change: African/Asian cities growing 3-5% annually

Better Metric: Metropolitan Areas (2024 Estimates)

1. Tokyo, Japan: 37M
2. Delhi, India: 33M
3. Shanghai, China: 29M
4. São Paulo, Brazil: 22M
5. Mexico City, Mexico: 22M
6. Dhaka, Bangladesh: 22M
7. Cairo, Egypt: 22M
8. Beijing, China: 21M
9. Mumbai, India: 21M
10. Osaka, Japan: 19M

For any serious analysis, specify your definition and data source. City proper rankings are trivia; metro rankings reflect reality.